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Infrastructure

I-405, SR 527 closures begin July 27

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Starting Monday, July 27, multiple Washington State Department of Transportation (WSDOT) projects will begin, causing lane closures on several highways across the Olympic Peninsula.

WSDOT will close up to two lanes of southbound I-405 between milepost 18. 11 and milepost 16. 45 nightly from 11 p.m. to 4 a.m. through July 31. Additionally, the center lane of southbound SR 527 will close nightly from 9 p.m. to 12 a.m. through July 30. State Route 203 will have one lane closed nightly from 7 p.m. to 6 a.m. through July 31, while SR 96 will alternate traffic daily from 7 a.m. to 2 p.m. through July 31. SR 20 will alternate traffic from 9 a.m. to 2:30 p.m. through July 30, and SR 9 will alternate traffic near Nooksack Road starting July 29.

πŸ“„ Source: WSDOT β€” Highway Construction & Closures β€” https://wsdot.wa.gov/travel/road-construction
Source receipts12 of 14 claims supported Β· 86%

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  • βœ“
    Starting Monday, July 27, multiple Washington State Department of Transportation projects will beginβ€œ405: Monday, July 27 to the morning of Friday, July 31: Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed, nightly from 11 p.m. – 4 a.m.”
  • ⚠
    Lane closures will occur on several highways across the Olympic PeninsulaNo usable supporting receipt β€” unverified.
  • βœ“
    WSDOT will close up to two lanes of southbound I-405 between milepost 18. 11 and milepost 16. 45 nightlyβ€œ405: Monday, July 27 to the morning of Friday, July 31: Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed, nightly from 11 p.m. – 4 a.m.”
  • βœ“
    The closure of southbound I-405 will be from 11 p.m. to 4 a.m.β€œ405: Monday, July 27 to the morning of Friday, July 31: Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed, nightly from 11 p.m. – 4 a.m.”
  • βœ“
    The closure of southbound I-405 will last through July 31β€œ405: Up to two lanes of southbound I-405 from Lake Washington Boulevard Southeast (milepost 9) to North 30th Street (milepost 6.5) will be closed nightly, 9:30 p.m. Monday, July 27 – 5 a.m. Friday, July 31.”
  • βœ“
    The center lane of southbound SR 527 will close nightly from 9 p.m. to 12 a.m.β€œ527: The center lane of southbound SR 527 from 214th Street Southeast to the southbound I-405 off-ramp will be closed nightly from 9 p.m. Monday, July 27 to 12 a.m. Thursday, July 30.”
  • βœ“
    The closure of the center lane of southbound SR 527 will last through July 30β€œ527: The center lane of southbound SR 527 from 214th Street Southeast to the southbound I-405 off-ramp will be closed nightly from 9 p.m. Monday, July 27 to 12 a.m. Thursday, July 30.”
  • βœ“
    State Route 203 will have one lane closed nightly from 7 p.m. to 6 a.m.β€œ203: From 7 p.m. to 6 a.m. Sunday nights through Friday mornings beginning Monday, July 27, one lane of State Route 203 will be closed for a paving project between just south of Duvall to the Monroe city limits (mileposts 12.53 to 23.20). Flaggers and pilot cars will direct alternating traffic through the remaining open lane.”
  • βœ“
    The closure of State Route 203 will last through July 31β€œ203: From 7 p.m. to 6 a.m. Sunday nights through Friday mornings beginning Monday, July 27, one lane of State Route 203 will be closed for a paving project between just south of Duvall to the Monroe city limits (mileposts 12.53 to 23.20). Flaggers and pilot cars will direct alternating traffic through the remaining open lane. Effective: Jul 24, 2026, 12:48 PM Expected end: Jul 31, 2026, 6:00 AM”
  • βœ“
    SR 96 will alternate traffic daily from 7 a.m. to 2 p.m.β€œ096: Daily from 7 a.m. to 2 p.m. beginning Monday, July 27 to 2 p.m. Friday, July 31, State Route 96 traffic will alternate with flaggers from East Lowell Larimer Road (milepost 4) to State Route 9 (milepost 6) for utilities work.”
  • βœ“
    The traffic alternation on SR 96 will last through July 31β€œ096: Daily from 7 a.m. to 2 p.m. beginning Monday, July 27 to 2 p.m. Friday, July 31, State Route 96 traffic will alternate with flaggers from East Lowell Larimer Road (milepost 4) to State Route 9 (milepost 6) for utilities work.”
  • βœ“
    SR 20 will alternate traffic from 9 a.m. to 2:30 p.m.β€œ020: Daily from 9 a.m. to 2:30 p.m. beginning Tuesday, July 28 to 2:30 p.m. Thursday, July 30, State Route 20 traffic will alternate with flaggers from Lyman Hamilton Road (milepost 79) to Russell Road (milepost 82) for utilities work.”
  • ⚠
    The traffic alternation on SR 20 will last through July 30No usable supporting receipt β€” unverified.
  • βœ“
    SR 9 will alternate traffic near Nooksack Road starting July 29β€œ009: Northbound & southbound traffic is alternating on SR 9 from just north of Nooksack Rd (MP 88) to just north of Hughes Rd (MP 90) due to roadwork. Effective: Jul 29, 2026, 6:59 AM”

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